3 English Contents Original Instruction Manual Printed on chlorine-free paper Printing inks contain vegetable oils, paper can be recycled. ADREAS STIHL AG & Co. KG, VA1.J _005_GB Guide to Using this Manual 2 Safety Precautions and Working Techniques 2 Mounting the Handles 11 Using the Unit 12 Fuel 13 Fueling 14 Gearbox 16 Fitting the Auger 17 Starting / Stopping the Engine 17 Operating Instructions 19 Releasing a Trapped Auger 20 Cleaning the Air Filter 20 Engine Management 21 Adjusting the Carburetor 21 Checking the Spark Plug 22 Engine Running Behavior 23 Replacing the Starter Rope and Rewind Spring 23 Storing the Machine 25 Maintenance and Care 26 Main Parts 27 Specifications 28 Special Accessories 29 Maintenance and Repairs 29 STIHL Incorporated Federal Emission Control Warranty Statement 30 Trademarks 32 { Allow only persons who fully understand this manual to operate your power drill. To receive maximum performance and satisfaction from your STIHL power drill, it is important that you read, understand and follow the safety precautions and the operating and maintenance instructions in chapter "Safety Precautions and Working Techniques" before using your power drill. For further information you can go to Contact your STIHL dealer or the STIHL distributor for your area if you do not understand any of the instructions in this manual. Because a power drill is a high-torque, gasoline-powered tool, some special safety precautions must be observed to reduce the risk of personal injury. Careless or improper use may cause serious or even fatal injury. 1

4 English Guide to Using this Manual Pictograms The meanings of the pictograms attached to or embossed on the machine are explained in this manual. Depending on the model concerned, the following pictograms may be on your machine. Symbols in Text Fuel tank for gasoline and engine oil mixture Press to operate manual fuel pump Auger brake Many operating and safety instructions are supported by illustrations. The individual steps or procedures described in the manual may be marked in different ways: A bullet marks a step or procedure. A description of a step or procedure that refers directly to an illustration may contain item numbers that appear in the illustration. Example: Loosen the screw (1). Lever (2)... In addition to the operating instructions, this manual may contain paragraphs that require your special attention. Such paragraphs are marked with the symbols and signal words described below: Danger! Indicates an imminent risk of severe or fatal injury. Indicates a hazardous situation which, if not avoided, could result in severe or fatal injury. Caution! Indicates a risk of property damage, including damage to the machine or its individual components. Engineering Improvements STIHL s philosophy is to continually improve all of its products. As a result, engineering changes and improvements are made from time to time. Therefore, some changes, modifications and improvements may not be covered in this manual. If the operating characteristics or the appearance of your machine differs from those described in this manual, please contact your STIHL dealer for assistance. Safety Precautions and Working Techniques Because a power drill is a high-torque, gasolinepowered tool, some special safety precautions must be observed to reduce the risk of personal injury. It is important that you read, fully understand and observe the following safety precautions and warnings. Read the instruction manual and the safety precautions periodically. Careless or improper use may cause serious or fatal injury. Have your STIHL dealer show you how to operate your power tool. Observe all applicable local safety regulations, standards and ordinances. Danger! Drilling into or contact with electrical wires may cause severe shock, burns or death. See "Working Conditions" below. 2

5 English Striking a hard object in the earth with the turning auger and the resulting slowing or stopping of the auger creates reactive forces. The transfer of rotational (reactive) forces can cause the auger powerhead and handles to rotate suddenly in a counterclockwise direction and can result in loss of control or cause the handle to hit the operator or throw him to the ground, resulting in serious injury. Do not lend or rent your power tool without the instruction manual. Be sure that anyone using it understands the information contained in this manual. The use of this machine may be hazardous. If the drilling tool comes in contact with your body, it could cause injuries. Use your wood boring drill only for drilling wood. Use your planting auger only for mass flower plantings, small decorative posts, sign holes or deep road fertilization. For use in existing flower beds. Do not use it for other purposes, since misuse may result in personal injury or property damage, including damage to the machine. Minors should never be allowed to use this power tool. Bystanders, especially children, and animals should not be allowed in the area where it is in use. To reduce the risk of injury to bystanders and damage to property, never let your power tool run unattended. When it is not in use (e.g. during a work break), shut it off and make sure that unauthorized persons do not use it. Most of these safety precautions and warnings apply to the use of all STIHL power drills. Different models may have different parts and controls. See the appropriate section of your instruction manual for a description of the controls and the function of the parts of your model. Safe use of a wood boring drill or a plant auger involves 1. the operator 2. the power tool 3. the use of the power tool. THE OPERATOR Physical Condition You must be in good physical condition and mental health and not under the influence of any substance (drugs, alcohol, etc.) which might impair vision, dexterity or judgment. Do not operate this machine when you are fatigued. Be alert if you get tired, take a break. Tiredness may result in loss of control. Working with any power tool can be strenuous. If you have any condition that might be aggravated by strenuous work, check with your doctor before operating this power tool. Prolonged use of a power tool (or other machines) exposing the operator to vibrations may produce whitefinger disease (Raynaud's phenomenon) or carpal tunnel syndrome. These conditions reduce the hand's ability to feel and regulate temperature, produce numbness and burning sensations and may cause nerve and circulation damage and tissue necrosis. All factors which contribute to whitefinger disease are not known, but cold weather, smoking and diseases or physical conditions that affect blood vessels and blood transport, as well as high vibration levels and long periods of exposure to vibration are mentioned as factors in the development of whitefinger disease. In order to reduce the risk of whitefinger disease and carpal tunnel syndrome, please note the following: 3

6 English Most STIHL power tools are available with an anti-vibration ("AV") system designed to reduce the transmission of vibrations created by the machine to the operator's hands. An AV system is recommended for those persons using power tools on a regular or sustained basis. Wear gloves and keep your hands warm. Keep the AV system well maintained. A power tool with loose components or with damaged or worn AV elements will tend to have higher vibration levels. Maintain a firm grip at all times, but do not squeeze the handles with constant, excessive pressure. Take frequent breaks. All the above-mentioned precautions do not guarantee that you will not sustain whitefinger disease or carpal tunnel syndrome. Therefore, continual and regular users should closely monitor the condition of their hands and fingers. If any of the above symptoms appear, seek medical advice immediately. The ignition system of the STIHL unit produces an electromagnetic field of a very low intensity. This field may interfere with some pacemakers. To reduce the risk of serious or fatal injury, persons with a pacemaker should consult their physician and the pacemaker manufacturer before operating this tool. Proper Clothing To reduce the risk of injury, the operator should wear proper protective apparel. To reduce the risk of injury to your eyes never operate your power tool unless wearing goggles or properly fitted protective glasses with adequate top and side protection complying with ASI Z 87.1 (or your applicable national standard). Power tool noise may damage your hearing. Wear sound barriers (ear plugs or ear mufflers) to protect your hearing. Continual and regular users should have their hearing checked regularly. Be particularly alert and cautious when wearing hearing protection because your ability to hear warnings (shouts, alarms, etc.) is restricted. Clothing must be sturdy and snug-fitting, but allow complete freedom of movement. Wear overalls or long pants made of heavy material to help protect your legs. Do not wear shorts, sandals or go barefoot. THE POWER TOOL Avoid loose-fitting jackets, scarfs, neckties, jewelry, flared or cuffed pants, unconfined long hair or anything that could become caught on branches, brush or the moving parts of the unit. Secure hair so it is above shoulder level. Good footing is very important. Wear sturdy boots with nonslip soles. Steel-toed safety boots are recommended. Wear an approved safety hard hat to reduce the risk of injury to your head when there is a danger of head injuries. Wear heavy-duty gloves. For illustrations and definitions of the power tool parts see the chapter on "Main Parts." 4

7 English ever modify this power tool in any way. Only attachments supplied by STIHL or expressly approved by STIHL for use with the specific STIHL model are authorized. Although certain unauthorized attachments, drills and augers are useable with STIHL power tools, their use may, in fact, be extremely dangerous. If this tool is subjected to unusually high loads for which it was not designed (e.g. heavy impact or a fall), always check that it is in good condition before continuing work. Check in particular that the fuel system is tight (no leaks) and that the controls and safety devices are working properly. Do not continue operating this machine if it is damaged. In case of doubt, have it checked by your STIHL servicing dealer. THE USE OF THE POWER TOOL Transporting the Power Tool Always stop the engine before putting the power drill down or carrying it. Carrying a power drill with the engine running is dangerous. Accidental acceleration of the engine can cause the drilling tool to rotate. During operation, the powerhead muffler and the material around it reach extremely high temperatures. Avoid setting down a hot unit onto dry, flammable material, or touching the hot muffler, you could receive serious burns. Carry the power drill with the drilling tool pointing down or using a carry strap with the drilling tool pointing to the rear with the hot muffler away from your body. Remove the drilling tool before transporting the power tool long distances. When transporting in a vehicle, properly secure your power tool to prevent turnover, fuel spillage and damage. When the power tool is not in use, shut it off and put it down so it cannot endanger others. Fuel Your STIHL power tool uses an oilgasoline mixture for fuel (see the chapter on "Fuel" of your instruction manual). Gasoline is an extremely flammable fuel. If spilled and ignited by a spark or other ignition source, it can cause fire and serious burn injury or property damage. Use extreme caution when handling gasoline or fuel mix. Do not smoke or bring any fire or flame near the fuel or the power tool. ote that combustible fuel vapor may escape from the fuel system. Fueling Instructions Fuel your power tool in well-ventilated areas, outdoors. Always shut off the engine and allow it to cool before refueling. Gasoline vapor pressure may build up inside the fuel tank depending on the fuel used, the weather conditions and the tank venting system. In order to reduce the risk of burns and other personal injury from escaping gas vapor and fumes, remove the fuel filler cap on your power tool carefully so as to allow any pressure build-up in the tank to release slowly. ever remove the fuel filler cap while the engine is running. Select bare ground for fueling and move at least 10 feet (3 m) from the fueling spot before starting the engine. Wipe off any spilled fuel before starting your machine. 5

8 English Check for fuel leakage while refueling and during operation. If fuel leakage is found, do not start or run the engine until the leak is fixed and any spilled fuel has been wiped away. Take care not to get fuel on your clothing. If this happens, change your clothing immediately. Different models may be equipped with different fuel caps. Toolless cap with grip In order to reduce the risk of fuel spillage and fire from an improperly tightened fuel cap, correctly position and tighten the fuel cap in the fuel tank opening. To do this with this STIHL cap, raise the grip on the top of the cap until it is upright at a 90 angle. Insert the cap in the fuel tank opening with the raised positioning marks on the grip of the cap and on the fuel tank opening lining up. Using the grip, press the cap down firmly while turning it clockwise as far as it will go (approx. 1/4 turn). 001BA220 K Misaligned, damaged or broken cap If the cap does not drop fully into the opening when the positioning marks line up and/or if the cap does not tighten properly when twisted, the base of the cap may be prematurely rotated (in relation to the top) to the closed position. Such misalignment can result from handling, cleaning or an improper attempt at tightening. Left: Right: Fold the grip flush with the top of the cap. Grip the cap and check for tightness. If the grip does not lie completely flush with the cap and the detent on the grip does not fit in the corresponding recess in the filler opening, or if the cap is loose in the filler opening, the cap is not properly seated and tightened and you must repeat the above steps. Base of cap in closed position (with open space) Base of cap correctly positioned for installation 001BA227 K To return the cap to the open position for installation, turn the cap (with the grip up) until it drops fully into the tank opening. ext, twist the cap counterclockwise as far as it will go (approx. 1/4 turn) this will twist the base of the cap into the correct position. Then, twist the cap clockwise, closing it normally. If your cap still does not tighten properly, it may be damaged or broken; immediately stop use of the unit and take it to your authorized STIHL dealer for repair. Screw Cap Unit vibrations can cause an improperly tightened fuel filler cap to loosen or come off and spill quantities of fuel. In order to reduce the risk of fuel spillage and fire, tighten the fuel filler cap by hand as securely as possible. See also the "Fueling" chapter in your Instruction Manual for additional information. 001BA226 K 6

9 Before Starting Always check your power tool for proper condition and operation before starting, particularly the throttle trigger, throttle trigger lockout, stop switch and drilling tool or auger. The throttle trigger must move freely and always spring back to the idle position. ever attempt to modify the controls or safety devices. Regular maintenance is important in this respect. Check the condition and the tightness of the drilling tool. ever operate your power tool if it is damaged, improperly adjusted or maintained, or not completely or securely assembled. Check that the spark plug boot is securely mounted on the spark plug a loose boot may cause arcing that could ignite combustible fumes and cause a fire. Keep the handles clean and dry at all times; it is particularly important to keep them free of moisture, pitch, oil, fuel mix, grease or resin in order for you to maintain a firm grip and properly control your power tool. Starting Start the engine at least 10 feet (3 m) from the fueling spot, outdoors only. For specific starting instructions, see the appropriate section of your manual. Place the power tool on firm ground or other solid surface in an open area. Maintain good balance and secure footing. Your power drill should be started only when it is held steady by the operator. To reduce the risk of loss of control, be sure that the power drill gear is set in the neutral position. When the engine starts at starting throttle, engine speed will be fast enough for the clutch to engage and, if the gear is not set in the neutral position, turn the drilling tool. Once the engine has started, immediately blip the throttle trigger, which should release the starting throttle and allow the engine to slow down to idle. Your power tool is a one-person machine. Do not allow other persons in the general work area, even when starting. 421BA001 K Important Adjustments English To reduce the risk of injury from loss of control, do not attempt to "drop start" your power tool. When you pull the starter grip, do not wrap the starter rope around your hand. Do not let the grip snap back, but guide the starter rope to rewind it properly. Failure to follow this procedure may result in injury to your hand or fingers and may damage the starter mechanism. To reduce the risk of personal injury from loss of control or contact with the turning drilling tool, do not use your unit with incorrect idle adjustment. At correct idle speed, the drilling tool should not move. For directions on how to adjust idle speed, see the appropriate section of your instruction manual. If you cannot set the correct idle speed, have your STIHL dealer check your power tool and make proper adjustments and repairs. During Operation Holding and Controlling the Power Tool Always hold the unit firmly with both hands on the handles while you are working. Wrap your fingers and thumbs around the handles. 7

10 English Keep your hands in this position to have your power drill under control at all times. Drilling Planting Holes Drilling Holes in Wood Working Conditions Operate and start your power tool only outdoors in a well ventilated area. Operate it under good visibility and daylight conditions only. Work carefully. Do not overreach. Keep proper footing and balance at all times. Special care must be taken in slippery conditions (wet ground, snow) and in difficult, overgrown terrain. Watch for hidden obstacles such as tree stumps, roots and ditches to avoid stumbling. For better footing, clear away fallen branches, scrub and cuttings. Be extremely cautious when working on slopes or uneven ground. As soon as the engine is running, this product generates toxic exhaust fumes containing chemicals, such as unburned hydrocarbons (including benzene) and carbon monoxide, that are known to cause respiratory problems, cancer, birth defects, or other reproductive harm. Some of the gases (e.g. carbon monoxide) may be colorless and odorless. To reduce the risk of serious or fatal injury / illness from inhaling toxic fumes, never run the machine indoors or in poorly ventilated locations. To reduce the risk of injury from loss of control, never work on a ladder, in a tree or any other insecure support. ever hold the machine above shoulder height. ever work in a tree unless you have received specific, professional training for such work, are properly secured (such as tackle and harness system or a lift bucket), have both hands free for operating the power tool in a cramped environment. 8

11 English Inhalation of certain dusts, especially organic dusts such as mold or pollen, can cause susceptible persons to have an allergic or asthmatic reaction. Substantial or repeated inhalation of dust and other airborne contaminants, in particular those with a smaller particle size, may cause respiratory or other illnesses. Control dust at the source where possible. Use good work practices, such as operating the unit so that the wind or operating process directs any dust raised by the power tool away from the operator. Follow the recommendations of EPA / OSHA / IOSH and occupational and trade associations with respect to dust ("particulate matter"). When the inhalation of dust cannot be substantially controlled, i.e., kept at or near the ambient (background) level, the operator and any bystanders should wear a respirator approved by IOSH / MSHA for the type of dust encountered. Striking something hard in the earth (or a hard object in wood), such as a rock or gravel, may cause the drilling tool to slow down suddenly or stop. In such a situation, some or all of the rotational force (reactive force) is transferred to the powerhead of the power drill, which can cause the control handle powerhead and assist-handle to rotate suddenly in a counterclockwise direction. Work carefully in rocky ground or where other solid objects may be present. Keep throttle feed pressure to a minimum. If you feel or hear the drilling tool strike a solid object, release the throttle trigger immediately and remove the object before drilling is continued. When drilling in heavy clay soil, bore about 1/3 way and remove the auger from the hole. Clean off auger then continue in slow steps frequently clearing drill. You should hold your power drill firmly to control sudden jolts and reactive forces. Be prepared to release the throttle completely if the forces become too great. If reactive forces are not controlled, rotation of the handles may result in severe jerking and loss of control and may cause the powerhead or assist handle to strike you or throw you to the ground. If the auger becomes trapped in the drillhole, turn off the engine immediately and remove as descripted in the chapter entitled "Releasing a Trapped Auger." Danger! Contact with electrical cables or wires can cause serious injury or death as a result of electrical shock. This unit is not insulated. To reduce the risk of electrocution and damage to property, always be alert for underground pipes and cables and for overhead wires. Before drilling, obtain the necessary plans and permits. Contact your local utility company or your locator service, such as "Miss Utility" or "One Call", for information as to cable and pipe locations. Where necessary, confirm actual location by use of devices such as cable detectors and / or by carefully dug trenches. Stay clear of overhead electrical wires when backing the drilling tool out of the hole. If any portion of the machine strikes a wire, it will cause electrical shock or death. Thrown objects may ricochet and strike the operator. Operating Instructions Do not operate your power tool using the starting throttle lock, as you do not have control of the engine speed. In the event of an emergency, switch off the engine immediately move the stop switch to 0 or STOP. When taking the drilling tool out of the hole, lift the machine vertically so that the tool comes out straight without canting. Cover and clearly mark boreholes to prevent anyone from stepping in a hole. 9

12 English To reduce the risk of injury from contact with the drilling tool, always switch off the engine and put the gear in the neutral position before changing a drilling tool. For specific instructions to change the drilling tool see the chapter "Fitting the Drilling Tool." To reduce the risk of injury, never touch a drilling tool or drilling spindle with your hand or any part of your body. It continues to rotate for a short period after the throttle lever is released. Always shut off the engine before putting the machine down. MAITEACE, REPAIR AD STORIG Maintenance, replacement, or repair of the emission control devices and systems may be performed by any nonroad engine repair establishment or individual. However, if you make a warranty claim for a component which has not been serviced or maintained properly or if nonapproved replacement parts were used, STIHL may deny coverage. Use only identical STIHL replacement parts for maintenance and repair. Use of non-stihl parts may cause serious or fatal injury. Strictly follow the maintenance and repair instructions in the appropriate section of your instruction manual. Please refer to the maintenance chart in this manual. Always stop the engine and turn the gear into the neutral position before doing any maintenance or repair work or cleaning the power tool. Do not attempt any maintenance or repair work not described in your instruction manual. Have such work performed by your STIHL servicing dealer only. ever test the ignition system with the spark plug boot removed from the spark plug or with a removed spark plug, since uncontained sparking may cause a fire. Use the specified spark plug and make sure it and the ignition lead are always clean and in good condition. Always press spark plug boot snugly onto spark plug terminal of the proper size. (ote: If terminal has detachable SAE adapter nut, it must be securely attached.) A loose connection between spark plug terminal and the ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire. Check condition of drilling tool at regular short intervals. If behavior of tool changes, check immediately for tightness or any signs of cracks in particular. Wear gloves when handling or performing maintenance on used drilling tools or augers. Replace damaged drilling tools immediately, even if the have only superficial cracks. ever attempt to repair damaged drilling tools. Do not operate your power tool if the muffler is damaged, missing or modified. An improperly maintained muffler will increase the risk of fire and hearing loss. Your muffler is equipped with a spark-arresting screen to reduce the risk of fire; never operate your power tool if the screen is missing, damaged or clogged. Remember that the risk of a brush or forest fire is greater in hot or dry weather. In California, it is a violation of 4442 or 4443 or the Public Resources Code to use or operate gasoline-powered tools on forest-covered, brush-covered or grass-covered land unless the engine s exhaust system is equipped with a complying spark arrester that is maintained in effective working order. The owner/operator of this product is responsible for properly maintaining the 10

13 English spark arrester. Other states or governmental entities/agencies, such as the U.S. Forest Service, may have similar requirements. Contact your local fire agency or forest service for the laws or regulations relating to fire protection requirements. Tighten all nuts, bolts and screws except the carburetor adjustment screws after each use. For any maintenance of the emission control system please refer to the maintenance chart and to the limited warranty statement near the end of the instruction manual. Do not clean your machine with a pressure washer. The solid jet of water may damage parts of the machine. Store your power tool in a dry and locked location out of reach of children. Before storing for longer than a few days, always empty the fuel tank (see chapter "Storing the Machine" in the instruction manual). Mounting the Handles Assist handle for wood drill Before mounting a new assist handle for the first time: 2 1 Hold the handle (1) by the clamp and turn it clockwise until the gap (2) is completely closed. This breaks the small plastic retainer in the clamp and allows the clamp to be opened up. ormal mounting procedure Hold the clamp firmly and unscrew the handle counterclockwise. 421BA003 K Open up the clamp slightly. Push the handle over the chuck until it butts against the machine the clamp must engage the groove on the gearbox housing. Screw the handle into clamp clockwise. Move the handle to the required position and tighten it down firmly. 421BA036 K 421BA005 K 11

14 English Assist handle for planting auger Using the Unit Working with the planting hole auger BA037 K Your power drill can be used for a range of applications, e.g. fence-building and carpentry (kit for wood drill) and in landscaping and gardening (kit for planting hole auger). General Loosen the two wing screws (3) on the flange (4). Make sure the polymer bushing is properly seated (see arrow). To change the drilling tool, always shut off the engine and set the rotary knob to. 5 Always fit the assist handle specified for the drilling tool you intend to use. See "Mounting the Handles". 421BA002 K Push the flange onto the machine as far as stop and line it up. Insert the handle tube (5) in the flange. Move the handle to the required position and tighten down the two wing screws firmly. 421BA007 K During operation, always hold the machine firmly with both hands to control unexpected reactive forces caused by the drilling tool jamming in or passing through the material. Make sure you have a safe and secure footing. During operation, always hold the machine firmly with both hands to control unexpected reactive forces that may occur if the drilling tool jams, e.g. in rocky ground. Release the throttle trigger if the drilling tool jams. The planting hole auger should be operated only with the gearbox set to position 1. The tool speed is too high for drilling planting holes when the gearbox is set to poistion 2. 12

15 Working with a wood drill or twist drill Make sure you have a safe and secure footing. During operation, always hold the machine firmly with both hands to control unexpected reactive forces caused by the drilling tool jamming in or passing through the wood. Release the throttle trigger if the drilling tool jams. Drilling tool jammed See "Releasing a Trapped Auger". 421BA009 K Fuel This engine is certified to operate on unleaded gasoline and the STIHL twostroke engine oil at a mix ratio of 50:1. Your engine requires a mixture of highquality gasoline and two-stroke air cooled engine oil. Use mid-grade unleaded gasoline with a minimum octane rating of 89 (R+M/2) and no more than 10% ethanol content. Fuel with a lower octane rating may increase engine temperatures. This, in turn, increases the risk of piston seizure and damage to the engine. The chemical composition of the fuel is also important. Some fuel additives not only detrimentally affect elastomers (carburetor diaphragms, oil seals, fuel lines, etc.), but magnesium castings and catalytic converters as well. This could cause running problems or even damage the engine. For this reason STIHL recommends that you use only high-quality unleaded gasoline! Gasoline with an ethanol content of more than 10% can cause running problems and major damage in engines with a manually adjustable carburetor and should not be used in such engines. The ethanol content in gasoline affects engine running speed it may be necessary to readjust the carburetor if you use fuels with various ethanol contents. English To reduce the risk of personal injury from loss of control and / or contact with the running cutting tool, do not use your unit with incorrect idle adjustment. At correct idle speed, the cutting tool should not move. If your power tool shows an incorrect idle adjustment, have your STIHL dealer check your power tool and make proper adjustments and repairs. The idle speed and maximum speed of the engine change if you switch from a fuel with a certain ethanol content to another fuel with a much higher or lower ethanol content. This problem can be avoided by always using fuel with the same ethanol content. Use only STIHL two-stroke engine oil or equivalent high-quality two-stroke engine oils that are designed for use only in air cooled two-cycle engines. We recommend STIHL HP Ultra 2-Cycle Engine Oil since it is specially formulated for use in STIHL engines. Do not use BIA or TCW rated (twostroke water cooled) mix oils or other mix oils that state they are for use in both water cooled and air cooled engines (e.g., outboard motors, snowmobiles, chain saws, mopeds, etc.). Take care when handling gasoline. Avoid direct contact with the skin and avoid inhaling fuel vapor. When filling at the pump, first remove the container from your vehicle and place the container on the ground before filling. To reduce the risk of sparks from static 13

16 English discharge and resulting fire and/or explosion, do not fill fuel containers that are sitting in or on a vehicle or trailer. The container should be kept tightly closed in order to limit the amount of moisture that gets into the mixture. The machine s fuel tank should be cleaned as necessary. Fuel mix ages Fueling Preparations In order to reduce the risk of fire and personal injury from escaping gas vapor and fumes, remove the fuel filler cap carefully so as to allow any pressure build-up in the tank to release slowly Opening Only mix sufficient fuel for a few days work, not to exceed 3 months of storage. Store in approved fuel-containers only. When mixing, pour oil into the container first, and then add gasoline. Close the container and shake it vigorously by hand to ensure proper mixing of the oil with the fuel. Gasoline Oil (STIHL 50:1 or equivalent high-quality oils) Raise the grip into an upright position. 001BA218 K US gal. US fl.oz / Dispose of empty mixing-oil containers only at authorized disposal locations. Before fueling, clean the filler cap and the area around it to ensure that no dirt falls into the tank. Always thoroughly shake the mixture in the canister before fueling your machine. 547BA009 K Turn the cap counterclockwise (approx. 1/4 turn). 001BA219 K Position the machine so that the filler cap is facing up. 14

17 English 001BA224 K Remove fuel filler cap. Refueling While pressing the cap down, twist it firmly clockwise as far as it will go (approx. 1/4 turn). Grip the cap and check for tightness. If the cap can be moved, it is not properly installed. Take care not to spill fuel while fueling and do not overfill the tank. Misalignment of the cap parts Closing Fold down the grip. If the cap does not drop fully into the opening when the positioning marks line up and/or if the cap does not tighten properly when twisted, the base of the cap may be rotated out of position vis-à-vis the top. 001BA220 K 001BA221 K 001BA222 K 001BA225 K Checking for proper closure Such misalignment can result from handling, cleaning or an improper attempt at tightening. With grip in an upright position: Insert the cap positioning marks on the cap and the fuel tank opening must line up. The cap should drop fully into the opening in this position. 001BA223 K 001BA227 K The lug on the grip must engage entirely in the recess (arrow), and the grip must lie completely flush with the top of the cap. Left: Right: Base of improperly aligned cap (with open space) Base of cap correctly positioned for installation 15

18 English Gearbox Do not change the position of the rotary knob while the engine is running above idle speed the drilling tool rotates. To correct a misalignment, turn the cap (with the grip up) until it drops fully into the tank opening. 001BA226 K (eutral) Gearbox idle position for starting the engine For adjusting the carburetor For changing drilling tools Twist the cap counterclockwise as far as it will go (approx. 1/4 turn) this will twist the base of the cap into the correct position. 1 Low-speed clockwise rotation, see "Specifications" Twist the cap clockwise, closing it normally see the sections "Closing" and "Checking for proper closure." If your cap still does not tighten properly, it may be damaged or broken; immediately stop use of the unit and take it to your authorized STIHL dealer for repair. The power drill is equipped with a change-speed gearbox. Depending on the application and the drilling tool used, the speed can be adjusted to suit requirements. 421BA017 K 2 High-speed clockwise rotation, see "Specifications" R Counterclockwise rotation, e.g. for releasing a trapped drilling tool Knob positions The position of the rotary knob may be changed only when the engine is running at idle speed the drilling spindle must be stationary. It may be necessary to turn the drilling spindle slightly before the rotary knob can be moved to the required position. 16

19 English Fitting the Auger Adapter for planting hole auger Starting / Stopping the Engine With the engine stopped (knob in position), place the machine on the ground and make sure it is secure. 5 3 Chuck for wood drills or twist drills 4 421BA039 K Screw the adapter (3) onto the drilling spindle (4) BA018 K Use a 13mm open-end wrench to hold the spindle steady and tighten the adapter firmly with a 19mm open-end wrench. Insert the drilling tool (1) in the chuck (2) and tighten it firmly. When using the geared rim drill chuck (special accessory), make sure you remove the chuck key before starting up. Secure the drilling tool (5) in the adapter. Use a 17mm open-end wrench to secure and release the planting hole auger. Set rotary knob to (gearbox in neutral). 421BA020 K The machine may only be started with the gearbox in neutral. If left in positions 1, 2 and R, the drilling tool may begin to rotate when the clutch engagement speed is reached. This could result in accidents or personal injury due to loss of control. 17

20 English Starting the engine Do not let the starter grip snap back. Guide it slowly back into the housing so that the starter rope can rewind properly. When the engine begins to fire: BA021 K Press the fuel pump bulb (5) at least five times. 421BA022 K l j Depress the choke lever (1) and set it to if the engine is cold for warm start also use this position if the engine has been running but is still cold. Move the stop switch (2) to F. Squeeze the throttle trigger (3) and hold it there. Press in the starting throttle lock (4) and hold it there. Let go of the throttle trigger and starting throttle lock. This is the starting throttle position. Cranking Place the unit on the ground so that it is secure. Press the machine against the ground with your left hand on the engine housing. Pull the starter grip slowly with your right hand until you feel it engage and then give it a brisk strong pull. Do not pull out the starter rope to full length it might otherwise break. 421BA001 K Set the choke lever to j. Continue cranking. As soon as the engine runs Blip the throttle trigger the starting throttle lock moves to the normal run position and the engine returns to idling speed. Shutting down the engine Move the stop switch to BA023 K 18

21 At very low outside temperatures: As soon as the engine runs: Blip the throttle trigger to disengage the starting throttle lock it moves the to normal run position and the engine returns to idle speed. Open throttle slightly warm up the engine for a short period. If the engine does not start If you did not move the choke lever to warm start j quickly enough after the engine began to fire, the combustion chamber is flooded. Set the choke lever to j. Set the throttle trigger to the starting throttle position. Start the engine by pulling the starter rope briskly 10 to 20 pulls may be necessary. If the engine still does not start Move the stop switch to 0. Crank the engine several times with the starter to clear the combustion chamber. Refit the spark plug and connect the spark plug boot. Move the stop switch to F. Set the choke lever to j (warm start) even if the engine is cold. ow start the engine. If fuel tank has been run completely dry and then refueled Press the fuel pump bulb at least five times. ow start the engine. Operating Instructions During break-in period English A factory-new machine should not be run at high revs (full throttle off load) for the first three tank fillings. This avoids unnecessary high loads during the break-in period. As all moving parts have to bed in during the break-in period, the frictional resistances in the engine are greater during this period. The engine develops its maximum power after about 5 to 15 tank fillings. During Operation After a long period of full throttle operation, allow the engine to run for a short while at idle speed so that engine heat can be dissipated by the flow of cooling air. This protects enginemounted components (ignition, carburetor) from thermal overload. After Finishing Work 6 Pull off the spark plug boot (6). Unscrew and dry off the spark plug. Open the throttle wide. 421BA024 K Storing for a short period: Wait for the engine to cool down. Empty the fuel tank and keep the machine in a dry place, well away from sources of ignition, until you need it again. For longer out-ofservice periods see "Storing the Machine". 19

22 English Releasing a Trapped Auger Cleaning the Air Filter If the auger jams in the drill hole If there is a noticeable loss of engine power 421BA038 K Fit the filter cover, engage the two tabs (arrows) at the bottom first. Let go of the throttle trigger so that the engine returns to idling speed. 421BA025 K Insert the screw and tighten it down firmly. Move rotary knob to R position (counterclockwise rotation) it may be necessary to rotate the machine a little until the knob can be moved to the required position. Hold the machine firmly with both hands on the handles. Operate the throttle trigger. Increase engine speed and slowly pull the drilling tool out of the drill hole. 2 Set the choke lever to l. Loosen the screw (1). Remove the air filter cover (2). 421BA026 K Clean away loose dirt from around the filter. Take the air filter (3) out of the filter housing (4). Replace with a new filter or, as a temporary measure, knock it out or blow it clear do not wash. Replace any damaged parts. Install the filter in the filter housing. 20

23 Engine Management Exhaust emissions are controlled by the design of the fundamental engine parameters and components (e.g. carburation, ignition, timing and valve or port timing) without the addition of any major hardware. Adjusting the Carburetor General Information The carburetor comes from the factory with a standard setting. This setting provides an optimum fuel-air mixture under most operating conditions. With this carburetor it is only possible to adjust the high speed screw within fine limits. Standard Setting English Move the rotary knob to 1. Adjust idle speed with the idle speed screw (LA) so that the drilling spindle does not rotate. Adjusting Idle Speed Engine stops while idling Turn the low speed screw (L) carefully clockwise as far as stop, then open it 1 full turn. Turn the idle speed screw (LA) slowly clockwise until the engine runs smoothly the drilling spindle must not rotate. LA 1 L 3/4 H Shutting down the engine Remove the auger. Check the air filter and clean or replace it if necessary. Turn high speed screw (H) counterclockwise as far as stop (no more than 3/4 turn). Turn the low speed screw (L) carefully clockwise as far as stop, then open it 1 full turn. Set rotary knob to (gearbox in neutral). Start and warm up the engine. 421BA027 K Drilling spindle rotates when engine is idling Turn the idle speed screw (LA) counterclockwise until the drilling spindle stops rotating and then turn the screw another 1/2 to 1 turn in the same direction. Erratic idling behavior, poor acceleration (even though low speed screw is open one turn) Idle setting is too lean. Turn the low speed screw (L) slowly counterclockwise until the engine runs and accelerates smoothly. It is usually necessary to change the setting of the idle speed screw (LA) after every correction to the low speed screw (L). 21

24 English Fine Tuning for Operation in Mountains or at Sea Level 3/4 H A slight correction of the setting of the high speed screw (H) may be necessary if engine power is not satisfactory when operating at high altitude or at sea level. Check the standard setting. Warm up the engine. Adjust idle speed properly. At high altitude Turn high speed screw (H) clockwise (leaner) no further than stop. At sea level Turn high speed screw (H) counterclockwise (richer) no further than stop. If the setting is too lean there is a risk of engine damage due to insufficient lubrication and overheating. 421BA028 K Checking the Spark Plug Wrong fuel mix (too much engine oil in the gasoline), a dirty air filter and unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. These factors cause deposits to form on the insulator nose which may result in trouble in operation. If engine is down on power, difficult to start or runs poorly at idling speed, first check the spark plug. Remove spark plug see "Starting / Stopping the Engine". Clean dirty spark plug. Check electrode gap (A) and readjust if necessary see "Specifications". 000BA002 K Use only resistor type spark plugs of the approved range. Rectify problems which have caused fouling of spark plug: Too much oil in fuel mix. Dirty air filter. Unfavorable running conditions, e.g. operating at part load. Fit a new spark plug after approx. 100 operating hours or earlier if the electrodes are badly eroded. 22

25 English Engine Running Behavior Replacing the Starter Rope and Rewind Spring 1 000BA036 TR If engine running behavior is unsatisfactory even though the air filter is clean and the carburetor is properly adjusted, the cause may be the muffler. Have the muffler checked for contamination (carbonization) by your servicing dealer. STIHL recommends that you have servicing and repair work carried out exclusively by an authorized STIHL servicing dealer. Replacing the Starter Rope Take out the screws (1). Remove the fan housing. 421BA029 K To reduce the risk of fire and burn injury, use only spark plugs authorized by STIHL. Always press spark plug boot (2) snugly onto spark plug terminal (1) of the proper size. (ote: If terminal has detachable SAE adapter nut, it must be attached.) A loose connection between spark plug boot and ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire Remove the spring clip (2). Carefully remove the rope rotor with washer (3) and pawl (4). 421BA030 K The rewind spring may pop out and uncoil during this operation take care to avoid the risk of injury. 23

26 English Tensioning the rewind spring 5 Thread the rope through the rotor and secure it with a simple overhand knot. 421BA032 K Coat the rope rotor bearing bore with non-resinous oil. Remove the remaining rope from the rotor and starter grip. Tie a simple overhand knot in the new rope. Thread the new rope through the top of the starter grip and the rope bushing (5). 421BA031 K Slip the rotor over the starter post turn it back and forth to engage the anchor loop of the rewind spring Fit the pawl (4). Fit the washer (3). Push the spring clip (2) into position it must point clockwise and engage the pawl's peg. 421BA030 K Make a loop in the unwound starter rope and use it to turn the rope rotor six full revolutions clockwise. Hold the rotor steady. Pull out and straighten the twisted rope. Release the rope rotor. Let go of the rope slowly so that it winds onto the rotor. The starter grip must locate firmly in the rope guide bushing. If the grip droops to one side: Add one more turn on rope rotor to increase spring tension 421BA033 K Replacing the rewind spring Remove the rope rotor as described in "Replacing the Starter Rope". 24

27 English The bits of broken spring may still be under tension and could fly apart when you remove the rope rotor. To reduce risk of injury, wear eye and face protection and work gloves BA034 K Storing the Machine For periods of 3 months or longer Remove the drilling tool. Drain and clean the fuel tank in a well ventilated area. Dispose of fuel properly in accordance with local environmental requirements. Run the engine until the carburetor is dry this helps prevent the carburetor diaphragms sticking together. Thoroughly clean the machine pay special attention to the cylinder fins and air filter. Store the machine in a dry, high or locked location, out of the reach of children and other unauthorized persons. Place the new spring with frame in position check that outer loop (6) is properly engaged. Use a suitable tool to push the spring into the housing. Apply tool through the openings (arrows). The frame slips off in this process. If the spring pops out and uncoils, refit it in the counterclockwise direction, starting outside and working inwards. Refit the rope rotor as described in "Replacing the Starter Rope". Tensioning the rewind spring Fit the fan housing. 25